MySQL操作类（本人自己写的）

 package com.test;
 import java.sql.Connection;
 import java.sql.DriverManager;
 import java.sql.PreparedStatement;
 import java.sql.ResultSet;
 import java.util.Vector;
 public class DBUtil {

     //定义连接数据库需要的
     Connection ct=null;
     PreparedStatement pS=null;
     ResultSet rS=null;
     private static String url = "jdbc:mysql://"+DBSomeType.MYSQLURL+":3306/weixin?characterEncoding=UTF-8&autoReconnect=true";
     private static String driverName = "com.mysql.jdbc.Driver";

     /**
      *  数据库查询，本操作查询完需手动关闭连接
      * @param sql
      * @param params
      * @return 查询结果ResultSet
      */
     public ResultSet getSlect(String sql,Object ...params){
         Vector rowDate=new Vector();
         Vector columnDate =new Vector();
         try {
             ct = connectWithDB();
             pS=ct.prepareStatement(sql);
             for(int i = 0;i < params.length;i++){
                 pS.setObject(i+1, params[i]);
             }
             rS=pS.executeQuery();
         } catch (Exception e) {
             // TODO: handle exception
         }finally{
             return rS;
         }
     }

     /************修改数据库操作*********************/
     public int update(String sql,Object ...params){
         int executeUpdate_int = 0;
         try {
             ct = connectWithDB();
             pS=ct.prepareStatement(sql);
             for(int i = 0;i < params.length;i++){
                 pS.setObject(i+1, params[i]);
             }
             //执行操作
             executeUpdate_int = pS.executeUpdate();
             System.out.println("executeUpdate_int = "+executeUpdate_int);
         } catch (Exception e) {
             // TODO: handle exception
         }finally{
             shutDownDB();
             return executeUpdate_int;
         }
     }

     /************连接数据库*********************/
     private Connection connectWithDB(){
         Connection connection = null;
         try {
             Class.forName(driverName);
             connection= DriverManager.getConnection(url, DBSomeType.ROOTUSERNAME, DBSomeType.ROOTPASSWORD);
         } catch (Exception e) {
             // TODO: handle exception
         }
         return connection;
     }

     /************关闭数据库的相关连接*********************/
     public void shutDownDB(){
         try
         {
             if(rS!=null) rS.close();
             if(pS!=null) pS.close();
             if(ct!=null) ct.close();
         } catch (Exception e2)
         {
             e2.printStackTrace();
             // TODO: handle exception
         }
     }

 }